Karimian Saeed, Shariat Mahdi, Mashayekhi Hamidreza
Department of Physics, Vali-e-Asr University of Rafsanjan, Rafsanjan, Iran.
Faculty of Physics, Shahid Bahonar University of Kerman, Kerman, Iran.
Sci Rep. 2025 Sep 26;15(1):32989. doi: 10.1038/s41598-025-16554-9.
This study investigates the rapid decolorization of methyl blue (MB) dye in water using a novel atmospheric non-thermal pulsed plasma system with a multi-pin-to-plate electrode configuration. The system integrates optical emission spectroscopy, UV-visible absorption spectroscopy, and response surface methodology for experimental design. A global kinetic model simulating over 150 species and 3500 reactions was employed to elucidate degradation mechanisms. Under optimized conditions, 97% of MB (initial concentration: 5 ppm) was decolorized within 120 s of plasma treatment. Significant increases in reactive species concentrations (·OH, O) were observed, alongside changes in water chemistry (pH, ORP, EC). These findings demonstrate the efficiency and scalability of the proposed plasma system for water treatment, providing new mechanistic insights and a framework for optimizing plasma-based degradation of organic pollutants.
本研究使用一种具有多针-平板电极配置的新型常压非热脉冲等离子体系统，研究水中甲基蓝（MB）染料的快速脱色。该系统集成了发射光谱、紫外-可见吸收光谱和响应面方法用于实验设计。采用一个模拟150多种物质和3500个反应的全局动力学模型来阐明降解机制。在优化条件下，等离子体处理120秒内，97%的MB（初始浓度：5 ppm）被脱色。观察到活性物种浓度（·OH、O）显著增加，同时水化学性质（pH、ORP、EC）发生变化。这些发现证明了所提出的等离子体系统用于水处理的效率和可扩展性，为优化基于等离子体的有机污染物降解提供了新的机理见解和框架。
